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LibJS+LibJIT: Add fast path for Int32 * Int32
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0aeb83b03f
commit
24fb009cf5
3 changed files with 64 additions and 1 deletions
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@ -546,6 +546,28 @@ struct Assembler {
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}
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}
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void mul32(Operand dest, Operand src, Optional<Label&> overflow_label)
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{
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// imul32 dest, src (32-bit signed)
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if (dest.type == Operand::Type::Reg && src.type == Operand::Type::Reg) {
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emit_rex_for_rm(dest, src, REX_W::No);
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emit8(0x0f);
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emit8(0xaf);
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emit_modrm_rm(dest, src);
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} else if (dest.type == Operand::Type::Reg && src.type == Operand::Type::Mem64BaseAndOffset) {
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emit_rex_for_rm(dest, src, REX_W::No);
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emit8(0x0f);
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emit8(0xaf);
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emit_modrm_rm(dest, src);
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} else {
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VERIFY_NOT_REACHED();
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}
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if (overflow_label.has_value()) {
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jump_if(Condition::Overflow, *overflow_label);
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}
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}
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void enter()
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{
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push(Operand::Register(Reg::RBP));
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